Improve command permission lookups

This allows us to append to the vanilla permission check object to avoid having to look into a map.

This also fixes non vanilla commands from technically being able to be skipped through permissions.

paper-server/patches/sources/com/mojang/brigadier/tree/CommandNode.java.patch

@@ -24,25 +24,6 @@
  
      protected CommandNode(final Command<S> command, final Predicate<S> requirement, final CommandNode<S> redirect, final RedirectModifier<S> modifier, final boolean forks) {
          this.command = command;
-@@ -61,7 +_,17 @@
-         return modifier;
-     }
- 
--    public boolean canUse(final S source) {
-+    // CraftBukkit start
-+    public synchronized boolean canUse(final S source) {
-+        if (source instanceof final net.minecraft.commands.CommandSourceStack css) {
-+            try {
-+                css.currentCommand.put(Thread.currentThread(), this); // Paper - Thread Safe Vanilla Command permission checking
-+                return this.requirement.test(source);
-+            } finally {
-+                css.currentCommand.remove(Thread.currentThread()); // Paper - Thread Safe Vanilla Command permission checking
-+            }
-+        }
-+        // CraftBukkit end
-         return requirement.test(source);
-     }
- 
 @@ -151,6 +_,12 @@
      protected abstract String getSortedKey();